Fisher's regression: GG GC CC Outcome y = a + b(#G) + c(Env) + d(#G x Env) y = a + b(GG) + c(GC) + d(CC) + e(Env) + f(Env x GG) + g(Env x GC) + h(Env x CC) Environment A GG GC CC Outcome Environment B
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